Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
thong cong » tong cong, thong thong, phong chong
hoc thieu » toc thieu, hoc hien
tran van » luan van
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
toan va » doan va, toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu xanh - thanh ((toan va) or (tran van)) ((thong cong) OR (trong cong)) dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh ((toan va) OR (tran van)) ((thong cong) OR (trong cong)) dan toan cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - thanh ((toan va) or (tran van)) ((thong cong) OR (trong cong)) dan toan cao*".